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Upload file in Asp.net

Asked by jonbob,

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jonbob

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I am trying to allow the user to upload a file to the server in Asp.net using vb. I have made progress using some scipts that I have found at various sites on the web. The script that I have works fine when uploadning txt files, but will not upload word or excel files regardless of their size. It doesn't even throw an error, it just says that the page can not be displayed. Is there some extra code that I need to add in order to other types of files?

PS - Word and Excel are not the only file types I want to be able to upload. They are just examples that I know don't work and need to. Here is my code:

<html>
<head>
<script language="VB" runat="server">

Sub Upload(Source As Object, e As EventArgs)

   If Not (myFile.PostedFile Is Nothing) Then

      Dim intFileNameLength as Integer
      Dim strFileNamePath as String
      Dim strFileNameOnly as String

      'Logic to find the FileName (excluding the path)
      strFileNamePath = MyFile.PostedFile.FileName
      intFileNameLength = Instr(1, StrReverse(strFileNamePath), "\")
      strFileNameOnly = Mid(strFileNamePath, (Len(strFileNamePath)-intFileNameLength)+2)

      myFile.PostedFile.SaveAs("c:\inetpub\wwwroot\Project\documentation\" & strFileNameOnly)
      lblMsg.Text = "File Upload Success."
   lblFileContentType.Text = "Content type: " & MyFile.PostedFile.ContentType
   lblFileSize.Text = "File size: " & CStr(MyFile.PostedFile.ContentLength) & " bytes"

   End If
End Sub
</script>

</head>
<body>

<h3>File Upload</h3>

<form enctype="multipart/form-data" runat="server">
   File: <input id="myFile" type="file" runat="server">    <input type=button value="Upload" OnServerClick="Upload" runat="server">
   <asp:label id=lblMsg runat="server" />
   <asp:label id=lblFileContentType runat="server" />
   <asp:label id=lblFileSize runat="server" />
</form>

</body>
</html>

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Grand Master

+primortal Subscriber²

Posted
  • Subscriber²
Posted

see if this works

  <script language="VB" runat=server>

       Sub DoUpload(Sender As Object, e As System.EventArgs)
          Dim sPath as String
          Dim sFile as String
          Dim sFullPath as String
          Dim sSplit() as String
          Dim sPathFriendly as String
          
         
          
          'Upload to same path as script
          'Internet Anonymous User must have write permissions
          
          sPath = Server.MapPath(".")
         If Right(sPath, 1) <> "\" then 
 	 sPathFriendly = sPath 'Friendly path name for display
 	 sPath = sPath & "\"
  Else
 	 sPathFriendly = Left(sPath, Len(sPath) - 1)
  End If
 	 
          
          'Save as same file name being posted
          'The code below resolves the file name
          '(removes path info)
          sFile = txtUpload.PostedFile.FileName
          sSplit = Split(sFile, "\")
          sFile = sSplit(Ubound(sSplit))
          
          
          
          sFullPath = sPath & sFile
    Try
          txtUpload.PostedFile.SaveAs(sFullPath)
         lblResults.Text = "Upload of File " & sFile & " to " & sPathFriendly & " succeeded"
         
         Catch Ex as Exception
 	 
 	 lblResults.Text = "Upload of File " & sFile & " to " & sPathFriendly & " failed for the following reason: " & Ex.Message
         Finally
 	 lblResults.Font.Bold = True
 	 lblResults.Visible = true
         End Try
  
       End Sub

    </script>
<html>



    <body>

      <form enctype="multipart/form-data" runat=server>
 	 
          <FONT face = +1><B>

           Select File To Upload:</b></FONT>
           <input id="txtUpload" type=file runat=server>
 	 <P align = CENTER>
          <asp:button id=btnUpload Text="Upload File" OnClick="DoUpload" runat=server/>
 	 
          <hr noshade>

          <asp:label id="lblResults" Visible=false runat=server/>

     </form>

   </body>
</html>

  • 0
Grand Master

+primortal Subscriber²

Posted
  • Subscriber²
Posted (edited)

with the above code, I can upload any filetype (exe, zip, msi, doc, xls). with your code I get the same error.

Even the code from http://www.4guysfromrolla.com/webtech/091201-1.shtml works fine. Is there some type of restriction on your server?

Edited by primortal
  • 0
Contributor

jonbob

Posted
  • Author
Posted

I am working off of the local server on my machine. As far as I know there are no restrictions. I tried to upload it to a couple different servers, and they both threw the error (Access to the path ...yadayada... is restricted. This makes since because on the servers FTP access is disabled for the we browser. At least this makes sense though, it gives me the error. On my local machine I am just getting the "Page can not be displayed" message. I can't figure out why it is doing this. The 4guysFromRolla script does the same thing. I tried that one first since 4guys is my mecca for asp.net advice. Do you have any more ideas? Maybe some permissions that need to be set to allow upload of these files?

  • 0
Grand Master

+chorpeac MVC

Posted
  • MVC
Posted

It does look and sound like the code should work. However, if you are able to save txt files, then it should be able to save others too. It's not a common feature that I am aware of where you can only save specific formats. You can go into IIS and make it spit out a more detailed message, so maybe then it will say you don't have permission or something more than page cannot be displayed

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